import math
val = str(input()).split()

numList = list(map(float, list(val)))

print(math.sqrt(((numList[2]-numList[0]) ** 2) + ((numList[3]-numList[1]) ** 2))) import math math val = str(input()).split() val str(input()).split() (input()).split (input()) str input() input split numList = list(map(float, list(val))) numList list(map(float, list(val))) list map(float, list(val)) map float list(val) list val print(math.sqrt(((numList[2]-numList[0]) ** 2) + ((numList[3]-numList[1]) ** 2))) print math.sqrt(((numList[2]-numList[0]) ** 2) + ((numList[3]-numList[1]) ** 2)) math.sqrt math sqrt ((numList[2]-numList[0]) ** 2) + ((numList[3]-numList[1]) ** 2) (numList[2]-numList[0]) ** 2 numList[2]-numList[0] numList[2] numList 2 numList[0] numList 0 2 (numList[3]-numList[1]) ** 2 numList[3]-numList[1] numList[3] numList 3 numList[1] numList 1 2 val = str(input()).split() str(input()).split() val numList = list(map(float, list(val))) list(map(float, list(val))) numList
import math
val = str(input()).split()

numList = list(map(float, list(val)))

print(math.sqrt(((numList[2]-numList[0]) ** 2) + ((numList[3]-numList[1]) ** 2)))
